31212104893651 has 4 divisors (see below), whose sum is σ = 34049568974904. Its totient is φ = 28374640812400.

The previous prime is 31212104893609. The next prime is 31212104893663. The reversal of 31212104893651 is 15639840121213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31212104893651 - 2¹¹ = 31212104891603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212104893681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1418732040610 + ... + 1418732040631.

It is an arithmetic number, because the mean of its divisors is an integer number (8512392243726).

Almost surely, 2^{31212104893651} is an apocalyptic number.

31212104893651 is a deficient number, since it is larger than the sum of its proper divisors (2837464081253).

31212104893651 is a wasteful number, since it uses less digits than its factorization.

31212104893651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837464081252.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 31212104893651 in words is "thirty-one trillion, two hundred twelve billion, one hundred four million, eight hundred ninety-three thousand, six hundred fifty-one".